Bottle cap detection equipment

Abstract

The invention discloses bottle cap detection equipment. The equipment comprises a rack; the upper-layer negative-pressure conveying belt assembly is arranged on the rack and used for conveying the bottle caps so that the bottom areas of the bottle caps can be exposed; the lower-layer negative-pressure conveying belt assembly is arranged on the rack and used for conveying the bottle caps so that the top areas of the bottle caps can be exposed; the first visual detection device is arranged below the upper-layer negative pressure conveying belt assembly and is used for detecting the bottom area of the bottle cap; the second visual detection device is arranged above the lower-layer negative pressure conveying belt assembly and is used for detecting the top area of the bottle cap; the third visual detection device comprises a cover body and a plurality of cameras, the cover body is provided with a shadowless light source and allows the lower-layer negative pressure conveying belt assembly to penetrate through, the inner wall of the cover body is provided with a diffuse reflection coating, the cameras are distributed on the peripheral side of the cover body, and the cover body is provided with an avoiding opening used for the cameras to detect the side face area of the bottle cap. When the side area of the bottle cap is detected, the structure is beneficial for reducing the influence of light reflection of the environment where the bottle cap is located.

Description

Technical Field

[0001] The present application relates to the technical field of bottle cap detection, and in particular to a bottle cap detection device. Background Art

[0002] Bottle caps are a common filling accessory, used to seal the filling ports of filling containers (glass bottles, plastic bottles, etc. filled with liquids). Before assembling the bottle caps at the filling ports of the filling containers, the bottle caps need to be inspected to ensure that the bottle caps entering the assembly process meet the requirements in terms of appearance, size, printing, labeling, etc.

[0003] In the prior art, visual inspection technology is usually used to inspect the bottom area, top area and side area of ​​the bottle cap. Specifically, the upper layer negative pressure conveyor belt assembly and the lower layer negative pressure conveyor belt assembly are partially overlapped and staggered to cooperate in feeding, and the upper layer negative pressure conveyor belt assembly and the lower layer negative pressure conveyor belt assembly both adsorb and convey the bottle caps by vacuum adsorption. When the bottle cap is conveyed by the upper layer negative pressure conveyor belt assembly, the bottom area of ​​the bottle cap is exposed, so that the bottom area of ​​the bottle cap can be inspected by visual inspection technology. When the bottle cap is conveyed by the lower layer negative pressure conveyor belt assembly, the top area of ​​the bottle cap is exposed, so that the top area of ​​the bottle cap can be inspected by visual inspection technology. Among them, when inspecting the side area of ​​the bottle cap, due to the unsatisfactory lighting environment of the bottle cap, the lighting of the bottle cap is uneven, which will produce shadows, and further affect the visual inspection. Therefore, in the related art, a cover with a light source disposed on the conveying path of the bottle caps is used to supplement light for the bottle caps. However, due to the influence of light reflection from the environment in which the bottle caps are located, the supplementary light effect of the bottle caps is not ideal, and there is still the problem of uneven light exposure on the bottle caps. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a bottle cap detection device, which is conducive to reducing the influence of light reflection in the environment where the bottle cap is located when detecting the side area of ​​the bottle cap, thereby facilitating improving the uniformity of light exposure to the bottle cap.

[0005] According to the embodiment of the present application, the bottle cap detection equipment includes: a frame; an upper negative pressure conveyor belt assembly, which is arranged on the frame and used to convey the bottle caps to be detected so that the bottom area of ​​the bottle caps is exposed; a lower negative pressure conveyor belt assembly, which is arranged on the frame and used to convey the bottle caps fed by the upper negative pressure conveyor belt assembly so that the top area of ​​the bottle caps is exposed; a first visual detection device, which is arranged below the upper negative pressure conveyor belt assembly and used to detect the bottom area of ​​the bottle caps; a second visual detection device, which is arranged above the lower negative pressure conveyor belt assembly and used to detect the top area of ​​the bottle caps; a third visual detection device, including a cover body with a shadowless light source for the lower negative pressure conveyor belt assembly to pass through and a plurality of cameras, the inner wall of the cover body is provided with a diffuse reflection coating, the plurality of cameras are distributed on the peripheral side of the cover body, and the cover body is provided with a avoidance opening for the cameras to detect the side area of ​​the bottle cap.

[0006] The bottle cap detection device according to the embodiment of the present application has at least the following beneficial effects: first, the bottle cap to be detected is conveyed by the upper negative pressure conveyor belt assembly so that the bottom area of ​​the bottle cap is exposed, and at the same time, the bottom area of ​​the bottle cap conveyed by the upper negative pressure conveyor belt assembly is detected by the first visual detection device arranged below the upper negative pressure conveyor belt assembly. Secondly, the bottle cap fed by the upper negative pressure conveyor belt assembly is conveyed by the lower negative pressure conveyor belt assembly so that the top area of ​​the bottle cap is exposed, and at the same time, the top area of ​​the bottle cap conveyed by the lower negative pressure conveyor belt assembly is detected by the second visual detection device arranged above the lower negative pressure conveyor belt assembly. Finally, the lower negative pressure conveyor belt assembly passes through the cover body with a shadowless light source, and the shadowless light source of the cover body is used to fill light for the bottle cap conveyed by the lower negative pressure conveyor belt assembly into the cover body, and at the same time, the side area of ​​the bottle cap entering the cover body is detected by multiple cameras distributed on the periphery of the cover body. Among them, when the side area of ​​the bottle cap is inspected, since the inner wall of the cover body is provided with a diffuse reflection coating, the light provided by the shadowless light source of the cover body can be diffusely reflected when it hits the inner wall of the cover body, which is beneficial to reduce the influence of light reflection of the environment in which the bottle cap is located, and further beneficial to improve the uniformity of light exposure to the bottle cap.

[0007] According to some embodiments of the present application, the bottle cap detection equipment also includes a material receiving part, which is arranged on the frame and is used to dock with the discharge end of the external feeding mechanism to receive the bottle caps fed by the discharge end of the external feeding mechanism, and one end of the upper negative pressure conveyor belt assembly close to the material receiving part is located directly above the material receiving part, and the upper negative pressure conveyor belt assembly is used to adsorb the bottle caps received by the material receiving part and convey the adsorbed bottle caps, and the material receiving part is provided with a blowing port for connecting to a positive pressure air source and blowing air to the bottom of the bottle caps received by the material receiving part.

[0008] According to some embodiments of the present application, the bottle cap detection equipment also includes a negative pressure generating device, which has an air inlet end and an air outlet end, the air inlet end is connected to the upper negative pressure conveyor belt assembly through a pipeline, and the air outlet end is connected to the air port through a pipeline.

[0009] According to some embodiments of the present application, the material receiving portion has a portion extending from the blowing port along the feeding direction of the upper negative pressure conveyor belt assembly, and the portion is provided with a plurality of blowing holes for connecting to a positive pressure air source and distributed along the feeding direction of the upper negative pressure conveyor belt assembly, and the blowing holes are used for blowing air upwards.

[0010] According to some embodiments of the present application, a positive pressure chamber is provided inside the material receiving part, and a constant pressure valve is provided in the positive pressure chamber to separate the positive pressure chamber into a first chamber and a second chamber which are interconnected, the first chamber is used to be connected to a positive pressure gas source, the constant pressure valve is used to maintain the pressure in the second chamber, the blowing port is connected to the first chamber, and the blowing hole is connected to the second chamber.

[0011] According to some embodiments of the present application, the material receiving portion is provided with a limiting groove extending along the feeding direction of the upper negative pressure conveyor belt assembly and used to accommodate bottle caps, the end of the limiting groove is an open structure, and the blowing port is located at the bottom of the limiting groove.

[0012] According to some embodiments of the present application, the bottle cap detection equipment further includes a collecting hopper with an upward opening, the collecting hopper is arranged directly below the upper negative pressure conveyor belt assembly, and the collecting hopper is used to recover fallen bottle caps.

[0013] According to some embodiments of the present application, the upper negative pressure conveyor belt assembly includes a first bracket, a driving motor, a roller and an endless conveyor belt, the first bracket is arranged on the frame and extends along the feeding direction of the upper negative pressure conveyor belt assembly, the rollers are arranged at both ends of the first bracket, the endless conveyor belt is wound around the outside of the first bracket, the driving motor is arranged on the first bracket and is used to drive the endless conveyor belt to move, the interior of the first bracket is provided with a negative pressure chamber for connecting to a negative pressure gas source, and the endless conveyor belt is provided with adsorption holes that can be connected to the negative pressure chamber and used to adsorb bottle caps.

[0014] According to some embodiments of the present application, a height adjustment structure is provided on the frame corresponding to the upper negative pressure conveyor belt assembly, and the height adjustment structure is used to adjust the height of the upper negative pressure conveyor belt assembly.

[0015] According to some embodiments of the present application, the height adjustment structure includes a second bracket, a movable connecting piece, a screw assembly and a driving piece, the second bracket is arranged on the frame, the movable connecting piece is connected to the second bracket movably up and down and is connected to the first bracket, the screw assembly is arranged between the second bracket and the movable connecting piece, and the driving piece is connected to the screw assembly and is used to drive the movable connecting piece to move up and down relative to the second bracket.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a structural schematic diagram of a bottle cap detection device according to an embodiment of the present application;

[0019] Figure 2 is a structural schematic diagram of a bottle cap detection device from another perspective of an embodiment of the present application;

[0020] Figure 3 This is a structural schematic diagram of a bottle cap detection device from another perspective of an embodiment of the present application;

[0021] Figure 4 It is a schematic diagram of the partial structure of the material receiving part of the bottle cap detection device in one embodiment of the present application;

[0022] Figure 5 yes Figure 4 A partial enlarged schematic diagram in the middle;

[0023] Figure 6 yes Figure 4 A schematic cross-sectional view of the structure shown;

[0024] Figure 7 yes Figure 6 A partial enlarged schematic diagram of point B in the middle;

[0025] Figure 8 It is a schematic diagram of the state of transferring bottle caps between a material receiving portion and an upper negative pressure conveyor belt assembly in a bottle cap detection device according to an embodiment of the present application;

[0026] Fig. 9 yes Figure 1 A schematic diagram of a local structure of the structure shown;

[0027] Fig.10 This is a schematic structural diagram of an upper negative pressure conveyor belt assembly according to an embodiment of the present application;

[0028] Fig.11 yes Fig.10 A schematic cross-sectional view of the structure shown;

[0029] Fig.12 yes Fig.11 A partial enlarged schematic diagram of point C in the middle.

[0030] Reference numerals:

[0031] Bottle cap a, frame 100, second bracket 110, guide column 111, movable connecting part 120, guide sleeve 121, screw rod assembly 130, driving part 140, upper negative pressure conveyor belt assembly 200, first bracket 210, negative pressure chamber 211, driving motor 220, roller 230, endless conveyor belt 240, adsorption hole 241, lower negative pressure conveyor belt assembly 300, first visual inspection device 400, second visual inspection device 500, third visual inspection device 600, cover body 610, avoidance port 611, camera 620, material receiving part 700, blowing port 710, blowing hole 720, constant pressure valve 730, first chamber 740, second chamber 750, limiting groove 760, negative pressure generating device 800, air inlet end 810, air outlet end 820, collecting hopper 900. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0033] In the description of the present application, it should be understood that if orientation descriptions are involved, the orientations or positional relationships indicated, such as up, down, front, back, left, and right, are based on the orientations or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0034] In the description of this application, if the words "some", "greater than", "less than", "exceed", "above", "below", "within" etc. appear, "some" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number, and "above", "below", "within", etc. are understood to include the number.

[0035] In the description of this application, if the words "first", "second", etc. appear, they are only used to distinguish technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0037] Reference Figures 1 to 12 According to an embodiment of the present application, the bottle cap inspection equipment includes a frame 100, an upper negative pressure conveyor belt assembly 200, a lower negative pressure conveyor belt assembly 300, a first visual inspection device 400, a second visual inspection device 500 and a third visual inspection device 600.

[0038] Specifically, the upper negative pressure conveyor belt assembly 200 is arranged on the frame 100 and is used to convey the bottle cap a to be inspected so that the bottom area of ​​the bottle cap a is exposed, the lower negative pressure conveyor belt assembly 300 is arranged on the frame 100 and is used to convey the bottle cap a fed by the upper negative pressure conveyor belt assembly 200 so that the top area of ​​the bottle cap a is exposed, the first visual inspection device 400 is arranged below the upper negative pressure conveyor belt assembly 200 and is used to detect the bottom area of ​​the bottle cap a, the second visual inspection device 500 is arranged above the lower negative pressure conveyor belt assembly 300 and is used to detect the top area of ​​the bottle cap a, and the third visual inspection device 600 includes a cover body 610 with a shadowless light source for the lower negative pressure conveyor belt assembly 300 to pass through and a plurality of cameras 620, the inner wall of the cover body 610 is provided with a diffuse reflection coating, and the plurality of cameras 620 are distributed on the peripheral side of the cover body 610, and the cover body 610 is provided with an avoidance opening 611 for the camera 620 to detect the side area of ​​the bottle cap a.

[0039] Among them, the shadowless light source is a well-known technology, and its specific structure and working principle are not described in detail here.

[0040] The detection process of bottle cap a is as follows: first, the bottle cap a to be detected is conveyed by the upper negative pressure conveyor belt assembly 200 to expose the bottom area of ​​the bottle cap a, and at the same time, the bottom area of ​​the bottle cap a conveyed by the upper negative pressure conveyor belt assembly 200 is detected by the first visual inspection device 400 arranged below the upper negative pressure conveyor belt assembly 200. Secondly, the bottle cap a fed by the upper negative pressure conveyor belt assembly 200 is conveyed by the lower negative pressure conveyor belt assembly 300 to expose the top area of ​​the bottle cap a, and at the same time, the top area of ​​the bottle cap a conveyed by the lower negative pressure conveyor belt assembly 300 is detected by the second visual inspection device 500 arranged above the lower negative pressure conveyor belt assembly 300. Finally, the lower negative pressure conveyor belt assembly 300 passes through the cover body 610 with a shadowless light source, and the shadowless light source of the cover body 610 provides supplementary light for the bottle cap a conveyed by the lower negative pressure conveyor belt assembly 300 and entering the interior of the cover body 610. At the same time, the side area of ​​the bottle cap a entering the interior of the cover body 610 is detected by multiple cameras 620 distributed around the cover body 610.

[0041] Among them, when the side area of ​​bottle cap a is inspected, since the inner wall of the cover body 610 is provided with a diffuse reflection coating, the light provided by the shadowless light source of the cover body 610 can be diffusely reflected when it hits the inner wall of the cover body 610, which is beneficial to reduce the influence of light reflection in the environment where the bottle cap a is located, and further beneficial to improve the uniformity of light exposure to the bottle cap a.

[0042] Specifically, the visual inspection technology is a well-known technology, wherein the first visual inspection device 400 and the second visual inspection device 500 both adopt a relatively conventional visual inspection structure, and their specific structures and working principles are not described in detail here.

[0043] It should be noted that in some embodiments, the diffuse reflection coating is a nano coating, which is beneficial to improving the diffuse reflection effect. Of course, the diffuse reflection coating can also be formed by coating with other diffuse reflection coatings, which is not limited here.

[0044] It should be noted that in some of the embodiments, the plurality of cameras 620 on the periphery of the cover body 610 are distributed in a circular array, wherein four cameras 620 are arranged on the periphery of the cover body 610, each camera 620 is responsible for a 90° range, and the four cameras 620 can detect the side area of ​​the bottle cap a at 360° without blind spots. Of course, three cameras 620 or more cameras 620 can also be arranged to detect the side area of ​​the bottle cap a, which is not limited here.

[0045] Specifically, the camera 620 is an industrial camera.

[0046] Reference Figures 1 to 9In some embodiments thereof, the bottle cap detection equipment further includes a receiving portion 700, which is disposed on the frame 100 and is used to dock with the discharge end of the external feeding mechanism to receive the bottle caps a fed by the discharge end of the external feeding mechanism, and one end of the upper negative pressure conveyor belt assembly 200 close to the receiving portion 700 is located directly above the receiving portion 700, and the upper negative pressure conveyor belt assembly 200 is used to adsorb the bottle caps a received by the receiving portion 700 and convey the adsorbed bottle caps a, and the receiving portion 700 is provided with a blowing port 710 for connecting to a positive pressure air source and blowing air toward the bottom of the bottle caps a received by the receiving portion 700. When in use, the bottle cap a fed by the discharge end of the external loading mechanism is received by the receiving portion 700, wherein one end of the upper negative pressure conveyor belt assembly 200 close to the receiving portion 700 is located directly above the receiving portion 700, so that the upper negative pressure conveyor belt assembly 200 can absorb the bottle cap a received by the receiving portion 700 and transport the absorbed bottle cap a along its own feeding direction, so that the bottom area of ​​the bottle cap a is exposed, thereby being able to cooperate with the first visual inspection device 400 to inspect the bottom area of ​​the bottle cap a. Furthermore, the receiving portion 700 is provided with a blowing port 710 for connecting with a positive pressure air source and blowing air toward the bottom of the bottle cap a received by the receiving portion 700. When the upper negative pressure conveyor belt assembly 200 absorbs the bottle cap a received by the receiving portion 700, the positive pressure air source blows air toward the bottom of the bottle cap a received by the receiving portion 700 through the blowing port 710, so as to assist the bottle cap a to be separated from the support of the receiving portion 700 and be absorbed by the upper negative pressure conveyor belt assembly 200. The above structure is conducive to improving the response speed of the bottle cap a being transferred to the upper negative pressure conveyor belt assembly 200, and is also conducive to the upper negative pressure conveyor belt assembly 200 to more stably absorb the bottle cap a.

[0047] Reference Figure 8 In some embodiments, the bottle cap detection device further includes a negative pressure generating device 800, which has an air inlet end 810 and an air outlet end 820. The air inlet end 810 of the negative pressure generating device 800 is connected to the upper negative pressure conveyor belt assembly 200 through a pipeline, and the air outlet end 820 of the negative pressure generating device 800 is connected to the air outlet 710 through a pipeline. When in use, the air inlet end 810 of the negative pressure generating device 800 provides the upper negative pressure conveyor belt assembly 200 with negative pressure for adsorbing the bottle cap a, and the air outlet end 820 of the negative pressure generating device 800 provides the air outlet 710 with positive pressure for blowing up the bottle cap a, thereby realizing the recycling of airflow, which is conducive to reducing energy consumption compared to the case of using independent negative pressure air source and positive pressure air source.

[0048] Reference Figures 4 to 8In some embodiments, the receiving portion 700 has a portion extending from the air blowing port 710 along the feeding direction of the upper negative pressure conveyor belt assembly 200, and the portion is provided with a plurality of air blowing holes 720 for connecting to a positive pressure air source and distributed along the feeding direction of the upper negative pressure conveyor belt assembly 200, and the air blowing holes 720 are used to blow air upward. The airflow blown upward from the air blowing holes 720 can provide a certain supporting force for the bottle cap a conveyed by the conveying area where the upper negative pressure conveyor belt assembly 200 has already absorbed the bottle cap a and is close to the transfer position (i.e., the position where the bottle cap a is sucked up), which is helpful to prevent the bottle cap a conveyed by the upper negative pressure conveyor belt assembly 200 from falling.

[0049] Specifically, the diameter of the blowing hole 720 is smaller than the diameter of the blowing port 710 .

[0050] Reference Figures 6 to 8 In some embodiments, a positive pressure chamber is provided inside the material receiving portion 700, and a constant pressure valve 730 is provided inside the positive pressure chamber to separate the positive pressure chamber into a first chamber 740 and a second chamber 750 which are interconnected. The first chamber 740 is used to be connected to a positive pressure gas source, and the constant pressure valve 730 is used to maintain the pressure inside the second chamber 750. The air blowing port 710 is connected to the first chamber 740, and the air blowing hole 720 is connected to the second chamber 750. When in use, the same positive pressure gas source can be used to supply air to the air blowing port 710 and the air blowing hole 720 at the same time. Among them, the constant pressure valve 730 is used to maintain the pressure inside the second chamber 750, so that the air blowing hole 720 can stably provide a suitable airflow for assisting in supporting the bottle caps a conveyed by the upper negative pressure conveyor belt assembly 200.

[0051] Specifically, the first chamber 740 is connected to the air outlet 820 of the negative pressure generating device 800 through a pipeline.

[0052] Specifically, the constant pressure valve 730 uses a diaphragm and a compression spring to automatically adjust the pressure in the second chamber 750 so that the pressure in the second chamber 750 is stabilized at a preset pressure value. Among them, the constant pressure valve is a well-known technology, and its specific structure and working principle are not described here.

[0053] Reference Figures 4 to 7 In some embodiments, the receiving portion 700 is provided with a limiting groove 760 extending along the feeding direction of the upper negative pressure conveyor belt assembly 200 and used to accommodate the bottle cap a, which is beneficial to prevent the bottle cap a received by the receiving portion 700 from falling. The end of the limiting groove 760 is an open structure to facilitate receiving the bottle cap a fed by the discharge end of the external feeding mechanism. The blowing port 710 is located at the bottom of the limiting groove 760 to facilitate blowing toward the bottom of the bottle cap a received by the receiving portion 700.

[0054] Reference Figure 1 , Figure 3 and Fig. 9In some embodiments, the bottle cap detection device further includes a collecting hopper 900 with an upward opening, which is arranged directly below the upper negative pressure conveyor belt assembly 200, and the collecting hopper 900 is used to recover the fallen bottle caps a. When the bottle caps a conveyed by the upper negative pressure conveyor belt assembly 200 accidentally fall, they can be recovered by the collecting hopper 900.

[0055] Reference Figures 10 to 12 In some embodiments thereof, the upper negative pressure conveyor belt assembly 200 includes a first bracket 210, a driving motor 220, a roller 230 and an endless conveyor belt 240. The first bracket 210 is arranged on the frame 100 and extends along the feeding direction of the upper negative pressure conveyor belt assembly 200. Rollers 230 are arranged at both ends of the first bracket 210. The endless conveyor belt 240 is wound around the outside of the first bracket 210. The driving motor 220 is arranged on the first bracket 210 and is used to drive the endless conveyor belt 240 to move. A negative pressure chamber 211 for connecting to a negative pressure gas source is arranged inside the first bracket 210. The endless conveyor belt 240 is provided with an adsorption hole 241 that can be connected to the negative pressure chamber 211 and is used to adsorb the bottle cap a. Its structure is simple and easy to implement.

[0056] It should be noted that, in some embodiments, the output shaft of the driving motor 220 is connected to one of the rollers 230 to drive the roller 230 to rotate, thereby driving the endless conveyor belt 240 to move.

[0057] It should be noted that in some other embodiments, a tensioning assembly is provided on the first bracket 210, and the tensioning assembly includes multiple tensioning rollers. The output shaft of the drive motor 220 is connected to one of the tensioning rollers to drive the tensioning roller to rotate, and the annular conveyor belt 240 is wound around the tensioning roller so that the annular conveyor belt 240 can be driven to move when the tensioning roller rotates.

[0058] Specifically, one end of the lower negative pressure conveyor belt assembly 300 close to the upper negative pressure conveyor belt assembly 200 is located directly below the end of the upper negative pressure conveyor belt assembly 200 away from the material receiving part 700. The lower negative pressure conveyor belt assembly 300 is used to absorb the bottle caps a fed by the upper negative pressure conveyor belt assembly 200 and convey the absorbed bottle caps a.

[0059] Among them, the negative pressure conveyor belt assembly is a well-known technology, and the specific structure of the upper negative pressure conveyor belt assembly 200 is applicable to the lower negative pressure conveyor belt assembly 300, that is, the structure of the lower negative pressure conveyor belt assembly 300 is the same as that of the upper negative pressure conveyor belt assembly 200, and the two are only different in spatial position.

[0060] It should be noted that, in some of the embodiments, a height adjustment structure is provided on the frame 100 corresponding to the upper negative pressure conveyor belt assembly 200, and the height adjustment structure is used to adjust the height of the upper negative pressure conveyor belt assembly 200, so as to adapt to bottle caps a of different heights.

[0061] Reference Figures 1 to 3 as well as Fig. 9 In some embodiments, the height adjustment structure includes a second bracket 110, a movable connecting member 120, a screw assembly 130 and a driving member 140. The second bracket 110 is arranged on the frame 100. The movable connecting member 120 is connected to the second bracket 110 and can be moved up and down and is connected to the first bracket 210. The screw assembly 130 is arranged between the second bracket 110 and the movable connecting member 120. The driving member 140 is connected to the screw assembly 130 and is used to drive the movable connecting member 120 to move up and down relative to the second bracket 110. Its structure is simple and easy to implement.

[0062] It should be noted that in some embodiments, at least two guide posts 111 are spaced apart on the second bracket 110 , and a guide sleeve 121 passing through the guide posts 111 is provided on the movable connecting member 120 , so that the movable connecting member 120 can move up and down relative to the second bracket 110 .

[0063] It should be noted that, in some other embodiments, guide slots are arranged at intervals on the second bracket 110 , and a slider slidably connected to the guide slots is arranged on the movable connecting member 120 , so that the movable connecting member 120 can move up and down relative to the second bracket 110 .

[0064] It should be noted that, in some of the embodiments, the nut of the screw assembly 130 is fixedly set on the second bracket 110, and the screw of the screw assembly 130 is connected to the movable connecting member 120. At this time, when the driving member 140 drives the screw of the screw assembly 130 to rotate, the nut of the screw assembly 130 is fixed to drive the screw of the screw assembly 130 to move up and down, thereby driving the movable connecting member 120 to move up and down relative to the second bracket 110, and then driving the first bracket 210 to move up and down relative to the second bracket 110 to adjust the height of the upper negative pressure conveyor belt assembly 200.

[0065] It should be noted that, in some other embodiments, the nut of the screw assembly 130 is fixedly arranged on the movable connecting member 120, and the screw of the screw assembly 130 is rotatably arranged between the second bracket 110 and the frame 100. At this time, when the driving member 140 drives the screw of the screw assembly 130 to rotate, the screw of the screw assembly 130 can only rotate to drive the nut of the screw assembly 130 to move up and down, thereby driving the movable connecting member 120 to move up and down relative to the second bracket 110, and then driving the first bracket 210 to move up and down relative to the second bracket 110 to adjust the height of the upper negative pressure conveyor belt assembly 200.

[0066] Specifically, the driving member 140 is a hand wheel. Of course, the driving member 140 may also be a motor, which is not limited here.

[0067] It should be noted that, in some other embodiments, the height of the upper negative pressure conveyor belt assembly 200 may also be adjusted by a linear drive structure such as an electric push rod, a pneumatic cylinder, or an oil cylinder, which is not limited here.

[0068] In the description of this specification, if the description involves reference terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" and "some examples", it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A bottle cap detection device, characterized in that: include: frame; an upper negative pressure conveyor belt assembly, disposed on the frame and used to convey the bottle caps to be inspected so that the bottom area of ​​the bottle caps is exposed; a lower negative pressure conveyor belt assembly, disposed on the frame and used to convey the bottle caps fed by the upper negative pressure conveyor belt assembly, so that the top area of ​​the bottle caps is exposed; A first visual inspection device is disposed below the upper negative pressure conveyor belt assembly and is used to inspect the bottom area of ​​the bottle cap; A second visual inspection device is disposed above the lower negative pressure conveyor belt assembly and is used to inspect the top area of ​​the bottle cap; The third visual inspection device includes a cover body with a shadowless light source for the lower negative pressure conveyor belt assembly to pass through and a plurality of cameras, the inner wall of the cover body is provided with a diffuse reflection coating, the plurality of cameras are distributed around the cover body, and the cover body is provided with an avoidance opening for the camera to inspect the side area of ​​the bottle cap.

2. The bottle cap detection device according to claim 1, characterized in that: The bottle cap detection equipment also includes a material receiving part, which is arranged on the frame and is used to dock with the discharge end of the external feeding mechanism to receive the bottle caps fed by the discharge end of the external feeding mechanism, and one end of the upper negative pressure conveyor belt assembly close to the material receiving part is located directly above the material receiving part, and the upper negative pressure conveyor belt assembly is used to absorb the bottle caps received by the material receiving part and convey the absorbed bottle caps, and the material receiving part is provided with a blowing port for connecting to a positive pressure air source and blowing air to the bottom of the bottle caps received by the material receiving part.

3. The bottle cap detection device according to claim 2, characterized in that: The bottle cap detection equipment also includes a negative pressure generating device, which has an air inlet end and an air outlet end. The air inlet end is connected to the upper negative pressure conveyor belt assembly through a pipeline, and the air outlet end is connected to the air outlet through a pipeline.

4. The bottle cap detection device according to claim 2, characterized in that: The material receiving portion has a part extending from the blowing port along the feeding direction of the upper negative pressure conveyor belt assembly, and the part is provided with a plurality of blowing holes for connecting to a positive pressure air source and distributed along the feeding direction of the upper negative pressure conveyor belt assembly, and the blowing holes are used for blowing air upwards.

5. The bottle cap detection device according to claim 4, characterized in that: A positive pressure chamber is provided inside the material receiving part, and a constant pressure valve is provided in the positive pressure chamber to separate the positive pressure chamber into a first chamber and a second chamber which are connected to each other. The first chamber is used to be connected to a positive pressure gas source, and the constant pressure valve is used to maintain the pressure in the second chamber. The air port is connected to the first chamber, and the air hole is connected to the second chamber.

6. The bottle cap detection device according to claim 2, characterized in that: The material receiving portion is provided with a limiting groove extending along the feeding direction of the upper negative pressure conveyor belt assembly and used to accommodate bottle caps, the end of the limiting groove is an open structure, and the blowing port is located at the bottom of the limiting groove.

7. The bottle cap detection device according to claim 2, characterized in that: The bottle cap detection device also includes a collecting hopper with an upward opening, which is arranged directly below the upper negative pressure conveyor belt assembly and is used to recover fallen bottle caps.

8. The bottle cap detection device according to claim 2, characterized in that: The upper negative pressure conveyor belt assembly includes a first bracket, a driving motor, a roller and an endless conveyor belt. The first bracket is arranged on the frame and extends along the feeding direction of the upper negative pressure conveyor belt assembly. The rollers are arranged at both ends of the first bracket. The endless conveyor belt is wound around the outside of the first bracket. The driving motor is arranged on the first bracket and is used to drive the endless conveyor belt to move. A negative pressure chamber for connecting to a negative pressure gas source is arranged inside the first bracket. The endless conveyor belt is provided with adsorption holes that can be connected to the negative pressure chamber and used to adsorb bottle caps.

9. The bottle cap detection device according to claim 8, characterized in that: A height adjustment structure is provided on the frame corresponding to the upper negative pressure conveyor belt assembly, and the height adjustment structure is used to adjust the height of the upper negative pressure conveyor belt assembly.

10. The bottle cap detection device according to claim 9, characterized in that: The height adjustment structure includes a second bracket, a movable connecting piece, a screw assembly and a driving piece, the second bracket is arranged on the frame, the movable connecting piece is connected to the second bracket and is connected to the first bracket so as to be movable up and down, the screw assembly is arranged between the second bracket and the movable connecting piece, and the driving piece is connected to the screw assembly and is used to drive the movable connecting piece to move up and down relative to the second bracket.

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